Table 3
Summary of data extracted from 7 studies examining habitat use by Austropotamobius pallipes species complex at the reach scale (i.e., in one watercourse).
| Study | Lotic or lentic | Day (d)/night (n) | Sampling method (no. crayfish) | No. water courses (no. sites) | Water chemistry parameters | Habitat variables | Macro-invertebrates | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Channel substrate parameters | Vegetation parameters | Hydro-dynamic parameters & water temperature | Channel width | Bank structure | Land-use | Altitude | |||||||||||||||||
| Boulders/cobbles | Pebbles | Gravel & sand | Silt/mud | Bedrock | In-stream vegetation | Woody debris & roots | Detritus | Trees/shading | Water depth | Flow velocity | Water Temperature | Flow type e.g. riffle, glide | |||||||||||
| Reach scale studies | |||||||||||||||||||||||
| Armitage (2000) | Lotic | N | RT (12) | 1(2) | + | · | · | · | · | + | + | – | + | ||||||||||
| Benvenuto et al. (2008) | Lotic | N | NV (265) | 1(1) | · | · | · | · | · | · | + | · | · | +/− | +/− | +/− | |||||||
| Broquet et al. (2002) | Lotic | D | HS (271) | 1(4) | + | + | · | · | + | · | |||||||||||||
| Bubb et al. (2006) | Lotic | D | RT (20) | 1(1) | + | · | · | · | · | + | – | – | |||||||||||
| Clavero et al. (2009) | Lotic | N | NV (435) | 1(15) | – | · | + | + | · | + | + | +/− | |||||||||||
| Gherardi et al. (2001) | Lotic | N | NV (60) | 1(1) | · | · | · | · | · | +/− | + | +/− | |||||||||||
| Ream et al. (2009) | Lotic | D | SS (75) | 1(1) | · | +/− | · | · | · | · | · | · | |||||||||||
NV = night-viewing; HS = hand search; RT = radio-tracking; SS = Surber sampler. ‘·’denotes variable measured ‘+’ and ‘−’, denote positive and negative, respectively statistical correlation between parameter and presence/abundance. The presence of both signs indicates different relationship for different parts of population, or different aspects of the parameter measured.
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